Hello all, I've juste installed a new computer and I feel like I'm having trouble with my NVIDIA GPU but it could be something else so I've enclosed detailed output. As you can see in [lspci] output, my GPU is `NVIDIA Corporation GM107M [GeForce GTX 850M] (rev a2)` whose specification can be found in [specs]. The trouble I'd like to solve has the following symptoms: → Sometimes during booting process, it issues a lot of lines like `nouveau E[ PFIFO][0000:01:00.0] SCHED_ERROR [ UNK06 ]` (see [dmesg] output for full details). This seems to appear randomly: somtimes it has to reboot two or three times before being able to boot correctly, sometimes it just needs once and doesn't have nay troubles. → Some other times, windows appears to stop responding with no reasons. I have to mouse the pointer off so the window display will unfreeze and then I can put the pointer over again. I've found it seems to be related to lines like this one `nouveau E[ PIBUS][0000:01:00.0] HUB0: 0x000001 0x00000002 (0xbad00100)` in [dmesg]. It starts at timestamp 28.115820. → Sometimes, even the window manager (Gnome) freezes and I have to go to a tty to have a chance to get it unfreeze. It doesn't always work then sometimes I have to reboot my computer because it has become absolutely frozen (no mouse, no keyboard, even the keyboard CAPS light responds no more). → Finally, in Arch Linux I've become used to have X server started over tty1 and tty from 2 to 7 free. Actually, when startup reaches the end without faults, it start X server on tty1 then GDM (Gnome Display Manager) is shown on tty1 but once I log in to my account, my desktop is shown on tty2 and tty1 keeps displaying GDM. I'm quite puzzled by this and I don't know whether the last symptom is a bug or a feature (maybe multiple user simultaneous outputs). I've also enclosed for your information my [Xorg.0.log] file and [lsmod] output. If it's a bug, which software should I fill a bug report to? nouveau driver, X, GDM, Gnome? Just feel free to ask any further data you'd need about my configuration. Thank you in advance for you reply and have a good weekend! Caocoa --- references [lspci] https://pastee.org/mtwkr [specs] http://www.geforce.com/hardware/notebook-gpus/geforce-gtx-850m [dmesg] https://pastee.org/zd4tt [lsmod] https://pastee.org/t5z4e [Xorg.0.log] https://pastee.org/r5tak